Abstract: A control method for controlling a three-phase dynamoelectric machine that has phase coils arranged in groups includes setting values of a time phase difference of electric currents to be supplied to the in-phase coils of respective groups and a time phase difference of carrier frequencies with which three-phase inverters are PWM-controlled to satisfy a predetermined relationship among the time phase difference of electric currents, the time phase difference of carrier frequencies, and a space phase difference of in-phase coils of the respective groups. The predetermined relationship is based on a result of a comparison between a current amplitude of a primary component and a current amplitude of a secondary component of a carrier harmonic current.

Abstract: In a rotary electric machine, slots are formed between teeth of a stator core. A ratio of a number of poles to a number of slots is 2:3. When an electrical angle of a tooth tip width, which is a width dimension of a tip of each of the teeth in a circumferential direction of the stator, is represented by ?, an electrical angle of a pole arc angle, which is an angle formed by two straight lines that connect a rotation center of a rotor to corners on a rotor surface side of one permanent magnet, is represented by ?, and a number of pole pairs is represented by P, the tooth tip width is within a range of (electrical angle)±0.2°×P for a value that satisfies the following expression: ?=?2.5?+319.7 (0<??180) [deg].

Abstract: The rotating electric machine includes: a rotor; and a stator, wherein the rotor includes: a rotor core having a magnet insertion hole group including a plurality of magnet insertion holes; and a permanent magnet group including a plurality of permanent magnets inserted in the plurality of magnet insertion holes of the magnet insertion hole group, respectively, wherein the plurality of magnet insertion holes are arranged side by side in a shape convex toward a center of the rotor from a radially-outer side surface of the rotor core, wherein the permanent magnet group forms one magnetic pole, wherein, in a part of the rotor core between the radially-outer side surface and the magnet insertion hole group, a magnetic slit is formed to extend in a shape convex toward the center of the rotor from the radially-outer side surface, and wherein the magnet insertion hole group includes three magnet insertion holes.

Abstract: A multigroup, multiphase rotary electric machine control device including: a control target calculator to calculate an initial current command value of each phase based on a torque command value; a correction coefficient calculator to calculate a per-group correction coefficient corresponding to each group from a spatial mode M (M is 0 or a positive integer) of an electromagnetic force caused by magnetic flux density variation with respect to a rotational periodicity at the time of rotation of the multigroup, multiphase rotary electric machine; and a current command value corrector to calculate a current command value of the each phase, which is corrected based on the initial current command value and the per-group correction coefficient.

Abstract: A rotation angle detection device, including: a rotor; a stator including one bias magnetic field generation portion (BMFGP) and magnetic detection elements; and a rotation angle calculation processor calculating a rotation angle of the rotor from detection signals of the detection elements, wherein a surface of the rotor has convex and concave portions (CCPs), which change in “x” (“x”?1) cycles for a mechanical angle of 360, and a shape of the CCPs make the detection elements possible to obtain a sine wave, and wherein “a” (“a”?2) detection elements are arranged along a circumferential direction of the stator at equal intervals for one cycle of the CCPs-so as to be opposed to the surface of the rotor, and the BMFGP extends in the circumferential direction for one cycle of the CCPs so as to overlap with the “a” detection elements.

Abstract: A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.

Abstract: Provided is a rotating electric machine (100) including a stator (1) and a rotor (2). The rotor (2) includes a plurality of stages of rotor units (201 and 202) stacked in an axial direction. Each of the rotor units (201 and 202) includes a pair of permanent magnets (21) and slits (22a and 22b) arranged in one or more rows. The slits (22a and 22b) has an arc-like shape. Both ends of the arc-like shape are located on an outer periphery side of the rotor (2). When an angle formed between two straight lines that connect positions of both ends of the arc-like shape and a rotation axis center of the rotor (2) is defined as an arc angle, at least one of the arc angle of the slit (22a) and the number of rows of the slits is different between at least two rotor units (201 and 202).

Abstract: A control method includes setting, when a space phase difference of in-phase coils of the respective groups is represented by ?, a time phase difference of electric currents to be supplied to the in-phase coils of the respective groups is represented by ?, and a time phase difference of carrier frequencies with which the three-phase inverters are PWM-controlled, respectively, is represented by ?, values of ? and ? so that any one or both of the following relationships are satisfied: ?=±(?+2?), and ?=±(???)/2, based on a result of comparison between a current amplitude of a primary component and a current amplitude of a secondary component of a carrier harmonic current, to control the dynamoelectric machine.

Abstract: A rotating electric machine including a rotor including a rotor core arranged coaxially with a stator core via an air gap formed between the stator core and the rotor core, and a plurality of permanent magnet groups each forming one magnetic pole, A flux barrier is formed between one set of permanent magnets adjacent to each other in the circumferential direction in each permanent magnet group forming one magnetic pole. A pair of ribs is formed of regions of the rotor core between the flux barrier and the one set of permanent magnets. A first slit is formed in a region of the rotor core on the air gap side in a radial direction of the each permanent magnet group, and an end portion of the first slit on the flux barrier side is positioned between extension lines of the pair of ribs.

Abstract: A drive system including: a battery; a power generation device (PGD) including a power generator (PG) mounted to an engine shaft and an inverter converting AC-voltage of the PG into DC-voltage; a drive device (DD) including a motor driving a driven component and an inverter performing bi-directional conversion between AC-voltage of the motor and DC-voltage; a switching device (SD) including a plurality of switches switching a connection of the battery and the PGD at both ends of the DD between a series connection (S-connection) and a parallel connection (P-connection) for connection; a reactor arranged between the battery and SD or between the PGD and the DD; and a controller controlling each of the SD, PGD, and DD, wherein the controller uses, when a speed of the driven component is being changed, the SD to fix the connection of the battery and PGD to S-connection or P-connection after alternately switching the connection between the S-connection and the P-connection.

Abstract: A multigroup, multiphase rotary electric machine control device including: a control target calculator to calculate an initial current command value of each phase based on a torque command value; a correction coefficient calculator to calculate a per-group correction coefficient corresponding to each group from a spatial mode M (M is 0 or a positive integer) of an electromagnetic force caused by magnetic flux density variation with respect to a rotational periodicity at the time of rotation of the multigroup, multiphase rotary electric machine; and a current command value corrector to calculate a current command value of the each phase, which is corrected based on the initial current command value and the per-group correction coefficient.

Abstract: A control method includes setting, when a space phase difference of in-phase coils of the respective groups is represented by ?, a time phase difference of electric currents to be supplied to the in-phase coils of the respective groups is represented by ?, and a time phase difference of carrier frequencies with which the three-phase inverters are PWM-controlled, respectively, is represented by ?, values of ? and ? so that any one or both of the following relationships are satisfied: ?=±(?+2?), and ?=±(???)/2, based on a result of comparison between a current amplitude of a primary component and a current amplitude of a secondary component of a carrier harmonic current, to control the dynamoelectric machine.

Abstract: A control method for controlling a three-phase dynamoelectric machine that has phase coils arranged in groups includes setting values of a time phase difference of electric currents to be supplied to the in-phase coils of respective groups and a time phase difference of carrier frequencies with which three-phase inverters are PWM-controlled to satisfy a predetermined relationship among the time phase difference of electric currents, the time phase difference of carrier frequencies, and a space phase difference of in-phase coils of the respective groups. The predetermined relationship is based on a result of a comparison between a current amplitude of a primary component and a current amplitude of a secondary component of a carrier harmonic current.

Abstract: A rotation angle detection device including: a rotor; a stator including “b” (b?3) magnetic detection portions (MDPs) each including a bias magnetic field generation portion and a magnetic detection element (MDE); and a rotation angle processor calculating a rotation angle of the rotor based on a detection by the (MDEs). The rotor has convex and concave portions (CCPs), which change in “x” cycles for a mechanical angle 360 (“x”?1) to make the MDEs possible to obtain a sine wave. There are arranged “b” MDPs along a circumferential direction of the stator for each cycle of the CCPs, which are arranged at intervals of a mechanical angle 360×(n×b+m)/(x×b), where “n” (n?0) represents, by a number of cycles, a deviation amount of each of the MDPs from a reference position in the circumferential direction, and “m” (1?m?“b”) represents a position of a MDP in an arrangement order.

Abstract: A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.

Abstract: A rotary electric machine including a rotor including a rotor core; permanent magnets to be embedded in the rotor core; and a one end-side end plate configured to support one end side of the rotor core. The rotor core has rotor refrigerant passages through which refrigerant for cooling the permanent magnets flows in an axial direction of the shaft. The one end-side end plate has an end plate refrigerant passage communicating with the rotor refrigerant passages. The end plate refrigerant passage has refrigerant reservoirs, each projecting to an outer side in a radial direction of the shaft.

Abstract: A rotor of the permanent magnet rotating electric machine includes a rotor core, a plurality of magnets, and magnetic slits. Each of the magnetic slits is formed in a core region being a region between magnets of the plurality of magnets, and a gap. The magnetic slits are regions having a lower magnetic permeability than a magnetic permeability of the core region. One end of each of the magnetic slits, which is closer to an outer periphery of the rotor, is positioned in a portion of the core region on the same direction side as a direction of a force in a circumferential direction of the rotor, and another end closer to the rotation axis center of the rotor is positioned on the magnetic pole center or in a portion of the core region on a side opposite to the direction of the force.

Abstract: In a rotating electric machine, a rotor core has a rotor core cooling hole under a state of being coupled to a first gap at a position on a radially inner side with respect to a center portion of a first inner wall surface in a length direction. The rotor core has a radially-outer-side refrigerant flow path formed under a state of being coupled to a radially-outer-side end portion of the first gap. A first end plate has a communication path formed so as to extend from an inner end surface of the first end plate to the rotor core cooling hole. A second end plate has a discharge path formed so as to allow the radially-outer-side refrigerant flow path to communicate with an outside.

Abstract: In a drive system including a battery, a power generation device (PGD) including a generator mounted to an engine shaft, and a drive device (DD) including a motor for driving a driven component, a drive controller performs a drive control for PGD and DD and a switching control for a switching device. During a parallel connection, respective high-voltage side terminals (HVTs) of PGD and the battery are connected to a HVT of DD, and respective low-voltage side terminals (LVTs) of PGD and the battery are connected to LVT of DD. During a series connection, HVT of any one of PGD and the battery is connected to HVT of DD, and LVT of another one of PGD and the battery is connected to LVT of DD, and terminals of PGD and the battery, which are not connected to DD, are connected to each other.

Abstract: A plate heat exchanger causes heat exchange to be performed using a plurality of heat transfer plates stacked. Each of the heat transfer plates includes a plate body, a first-medium inlet, a first-medium outlet, a second-medium inlet, a second-medium outlet, and a projection that provides a passage. At least one of the first-medium inlet and the first-medium outlet is located at one of two corners at one end of the plate body which the projection contacts. At least one of the second-medium inlet and the second-medium outlet is located at one of two corners at the other end of the plate body from which the projection is separated.